package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.handler.HandlerMethod;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @PROJECT_NAME:sky-take-out
 * @NAME: JwtTokenUserInterceptor
 * @AUTHOR:$$
 * @Date:2023-08-18
 * @DESCRIPTION:
 **/

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {
    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,Object handler)throws Exception{
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)){
            return  true;
        }
        //1、从请求头中获取令牌
        String token =
                request.getHeader(jwtProperties.getUserTokenName());
        //2、校验令牌
        try{
            log.info("jwt校验:{}",token);
            Claims claims =
                    JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(),token);
                        Long userId =
                                Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
                        log.info("当前用户的id:",userId);
            BaseContext.setCurrentId(userId);
            //3、通过，放行
            return true;
        } catch (Exception ex){
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
    @Autowired
    private JwtTokenUserInterceptor jwtTokenUserInterceptor;
    /**
     * 注册自定义拦截器
     * @param registry
     */
    protected void addInterceptors(InterceptorRegistry registry) {
        log.info("开始注册自定义拦截器...");
        //.........
    }
}
